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queries run twice unless 'parse statements' checked?

From: "Johann" <johann(at)tygerpos(dot)com>
To: pgsql-odbc(at)postgresql(dot)org
Subject: queries run twice unless 'parse statements' checked?
Date: 2005-02-07 04:20:04
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-odbc
Running PostgreSQL 8.0, client is Visual Basic program using ADO, test case 
has one adodc and a bound grid.

Queries involving a 188,000 row table were slow, even when query was on 
single value in uniquely keyed index.

Turns out - from checking the plsqlodbc file, it was executing the query 
once like I said:

select something from somewhere where thing=value

[returning one row]

then it ran the query again without the where clause [really!]

SELECT something FROM somewhere (The second query had the keywords turned 
to upper case, if that helps identify what's going on.)

[returning 188,000 rows]

Naturally, this made things run slowly.  I fiddled around and eventually 
found that by checking "Parse Statements", this behavior stopped.

Anyway - is it supposed to work this way?

	- Johann

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